Expansion Pack

Extra material produced for an existing game, either by the game's original production company or by a third party. Expansion packs generally provide a new story line, more levels or maps and occasionally new items, equipment or units.

What makes an expansion different from a new game or a stand-alone game or even a sequel is that you need to have the original game installed to play it. The expansion contains more data for the game and does not have a game engine of its own, and it usually doesn't come with the original game. Although recently, a few companies have been releasing standalone expansion packs, which do in fact come with the engine, and allow the gamer to play with the extra content by itself, but having the original game too may have benefits (such as an Old Save Bonus allowing you to pick up with your endgame character, and avoid bag-spillage).

There has been some recent controversy over the fact that additional purchasable content on some recent games actually consists of unlocking material which shipped with the original game. While this practice is not exactly fraudulent, and has been employed for productivity software for years (for a recent and commonplace example, Windows Vista's five or so versions are all included on every disc, and the license key determines which features will be enabled), some gamers have felt cheated by being compelled to pay extra for content they already physically possessed.

This is not a new phenomenon. It is said that back in the 1970s, IBM would sell a low-end version of its original 360 mainframe, that if the customer ordered a higher-end version (which cost several thousand dollars for the upgrade), IBM would send out a technician who simply used a clipper to sever one wire.

Nearly every RTS game ever made had at least one expansion pack. While the older games usually just added bonus missions that were more challenging than the original game, it has become custom to expand the different factions unit lineup as well as frequently adding new factions to the game altogether.

MMORPGs used to rely heavily on this model and the biggesttitleswithphysicaleditions still do, either as the sole method of distribution or as an option for those with poor internet connections. Free to Play titles deliver most of their content updates online but may occasionally bundle several patches together on a disc in an example of this trope.

Not to be confused with third party self-titled add-ons, which usually just contain maps made with the games map editor (and usually not very advanced either). Third-party add-ons are often (though not always) produced by a game's fan community, and can take the form of extended (or heavily-revised) storylines, additional missions, new weapons, or a 'Total Conversion', which is a time-intensive process that (as the name suggests) converts the game into something else entirely, and usually involves a graphical overhaul, a new soundtrack, and even (in the most extreme cases) new model design and programming extensions (some of which push the game's original engine far beyond its design limitations).

Blizzard Entertainment loves these. But not as much as they love using these to play the Bait and Switch by effectively reversing the ending of the game they're for. (Unhappy endings become happy ones and vice versa.)

Warcraft II had Beyond the Dark Portal, which took the fight, well, beyond the Dark Portal, to the orcs' homeworld of Draenor, adding several hero units and a new tileset in the process.

Warcraft III had the Frozen Throne, which added lots of new heroes, units, buildings and maps in addition to a new campaign. One of the new places visited in the story was Outland, the ruined remains of Draenor.

First, there's the Burning Crusade, which released Outland as the Expansion Pack World (seeing a connection already?) in addition to a lot of other stuff, including two new playable races.

Wrath of the Lich King, the second expansion set, opens up a new continent, Northrend, and introduces death knights as a playable class.

Besides of adding new ares, the third one, Cataclysm, refactors all the initial zones to the game's current standards, introduces two more races, and adds high-level stuff amidst the old zones that have largely been ignored.

The Brood War expansion for StarCraft picked up the story and added several new unit types.

Diablo II had an expansion, Lord of Destruction, where you fought Diablo's younger brother (It Makes Sense in Context). The original Diablo had an official expansion pack called Hellfire, but it was made by a third party and was pretty sloppy in quality.

Half Life had a number of successful expansions, including Blue Shift and Opposing Force, and the sequel continues this tradition proudly with the Half-Life 2 Episodes series.

Thanks to Steam, the Episodes also blur the definition between expansion pack and sequel: if Half-Life 2 was installed, the Episodes would re-use assets and engine components from that game, acting like expansions; but if it wasn't, they would add the necessary files themselves.

Meanwhile, Blue Shift inverted the concept: it was packaged with its own copy of the engine and was in fact a full standalone install, but marketed as an expansion pack rather than a sequel due to its short length and unaltered gameplay.

A third party, We Create Stuff released (before Portal came out) a flash-based 2D game based on the idea of Valve's 3d Puzzle game. We Create Stuff then released a complete replacement map pack for Portal that can best be (charitably) described as exceedingly Nintendo Hard.

However, Colonization is so different as to virtually be another game, a remake of the old Sid Meier's Colonization from the early 90s using the Civ IV engine. It's kind of a weird mix of expansion and separate game.

Civilization V also now has a new expansion pack announced called Gods and Kings

Crysis: Crysis Warhead.

The Sims is worldwide known for being an Expansion PackCash Cow Franchise, the first one having seven expansion packs (all now conveniently packed with the original for the price of one game, spiting everyone who actually bought them separately) and the sequel having 8 expansion packs containing new game features and content, and 8 lower priced 'stuff packs' containing content only. The new game, Sims 3, already has 4 expansion packs and 3 Stuff packs.

The Elder Scrolls III: Morrowind has two expansion packs, Tribunal and Bloodmoon, adding additional areas and quests, and possibilities (as the title hints, the character can become a lycanthrope). However, they also update the game .exe to include additional functions not present in patches for the original game, introducing unfortunate dependencies on the expansion packs for the vast majority of the enormous selection of Morrowind mods created by the community.

City of Villains is an expansion pack and Gaiden Game for City of Heroes. It is also an example of an expansion that is fully built into the core game, and has to be unlocked by paying the complete price of an additional game. Furthermore, as of the end of 2006 City of Heroes has at least two smaller "bonus" packages that add extra powers and costume options to the game which can only be activated via separate purchases from NCSoft. (As of 2008, the games are no longer separate and everyone who had only one can access the other for no extra cost. 2010's Praetorean story arcs will be another stand-alone gaiden game that can be an expansion pack for City of Heroes / Villains.)

Almost all MMORPGs that remain popular long enough will release numerous expansion packs. Ultima Online and EverQuest both have over a dozen expansions apiece.

The Elder Scrolls IV: Oblivion has had several small downloadable content packs, and a full sized expansion.

Said downloadable content packs were later made into another full sized expansion.

Originally designed as Baldur's Gate III, Baldur's Gate II's expansion Throne of Bhaal was the climax to the Bhaalspawn story. (The game that would later be developed as "Baldur's Gate 3", The Black Hound, had nothing to do with the BG series' Bhaalspawn saga. It was only named that due to Interplay lacking the rights to make D&D games that weren't called "Baldur's Gate", the same reason for Baldur's Gate: Dark Alliance. Throne Of Bhaal was more a "proper" expansion pack, as compared to Tales Of The Sword Coast, which added a few dungeons (though they were big ones!), spells, and items and raised the level cap without actually impacting the main story.

Neverwinter Nights had two clear expansions, Shadows of Undrentide and Hordes of the Underdark, each of which introduced a new campaign, several new spells, weapons, feats, and prestige classes. Hordes of the Underdark also increased the level cap, introducing an epic tier to the game. In a strange twist, canonically the PC of Hordes of the Underdark is the same as Shadows of Undrentide, but NOT the same as the one in the original campaign.

The game designers acknowledged the shortness of Heart of Winter and released a free downloadable second expansion pack called Trials of the Luremaster. You need your copy of Heart of Winter installed to play it however.

One game with tons of expansion packs is Ultima VII: The Black Gate (commonly regarded as the best in the series), which didn't just get Forge of Virtue and Serpent Isle, the SI expansion pack even got its own expansion pack in the form of The Silver Seed. Due to clumsy marketing and a rushed release (ordered by corporate suits), The Silver Seed was shipped partially unfinished; while the expansion is in 'winnable', numerous unchecked plot holes, dangling story threads, and even one or two only partially-designed-but-abandoned-midway sidequests mar what is arguably one of Origin's finest works.

Probably the ultimate expansion pack would be Sonic & Knuckles, a cartridge game that literally attached to the previous title, Sonic the Hedgehog 3! This was because they were originally meant to be one game, but it was split in half to meet the deadline and a lock-on system was devised to allow the games to be played on their own or combined into one game. The feature also allowed them to make it an expansion for Sonic 2 as well, allowing players to be Knuckles.

Warhammer 40,000: Dawn of War's only true expansion pack, Winter Assault made videogame history as the first RTS expansion since Red Alert 2: Yuri's Revenge to introduce a new race or faction to play (The Imperial Guard), as well as the first where the new faction was playable in the game's campaign mode. Dark Crusade also introduced two additional races (The Tau and the Necron), but that was an example of that rarer beast, the StandaloneExpansion Pack.

Dawn of War also got a third expansion pack, Soulstorm which added Dark Eldar and the Sisters of Battle.

And Rise Of Nations had an expansion which introduced SIX new nations (races). I'm fairly certain it was before Dawn Of War. After Mythology though.

Dawn of War II had two standalone expansion packs: "Chaos Rising", which introduced Chaos, and "Retribution", which introduced the Imperial Guard.

In reality, the separate chapters of the Guild Wars saga aren't expansion packs, but entirely separate games. They may look like expansions, walk like expansions, but it's possible to independently own and play any of the three games separately. Naturally, there are benefits for combining the three products as a single game.

However, the Eye of the Northis a true expansion, in that it needs at least one of Prophecies, Factions, or Nightfall to be attached to. Given its supposed intention to act as a bridge between the current Guild Wars and Guild Wars 2, we could be looking at what may be the industry's first pre-expansion pack.

Factions and Nightfall aren't Mission Pack Sequels as each game in the series does add many new features, graphical upgrades, etc., which aren't in the original (Prophecies). Some of the new features and upgrades did get passed down to the original, however, many more features didn't, and most new features introduced after that were added to all three games simultaneously.

URU, the MMO spin-off of Myst, received a gratis expansion due to its general failure as an MMO. To D'ni gave non-beta players offline access to previously online-only areas. Path of the Shell was sold later. They rendered an installation incompatible with any online play, which had been shut down, until the GameTap-funded revival in 2007.

Tribes of the East, the second and last add-on to Heroes of Might and Magic 5, is an example of a stand-alone expansion. Mostly so because the main game's flaws, which mostly were addressed in this expansion, caused mediocre sales. However, there is no real bonus to owning the main game and the expansion, since all features except the campaigns are contained in TotE.

Final Doom provided two full level sets in one package, TNT: Evilution and The Plutonia Experiment, the first of which was originally intended to be a freeware Game Mod until id Software struck a publishing deal with its development team.

Persona 3 proved so popular that an expansion game, Persona 3: FES was released. This contains the original game but with an extra difficulty level (Hard), new calendar events and additional Personae to summon. The real meat of the expansion comes in the form of an extra 20-30hr scenario which serves as a direct sequel to the events of the main game. All this plus the fact that it retails for less than the original means that there's little to no reason to purchase the original anymore.

Syndicate has a single expansion pack called American Revolt. It is notably quite difficult.

Total Annihilation had two expansion packs, The Core Contingency and Battle Tactics. The first was a full expansion complete with campaign and dozens of new units, the second a map and mission pack.

The Xtreme Legends releases for the Warriors games. As consoles are generally not expansion-friendly, they've traditionally also worked as stand-alone games, but there's really nothing worth playing if you do use them as such... and with the advent of DLC, Koei seems to be moving towards just making them straight expansions.

The Command & Conquer series considers them obligatory. The first few (The Covert Operations for the first game, and Counterstrike for Red Alert) just added new missions, but from The Aftermath for Red Alert, they always added new units as well.

Tiberian Sun: Firestorm, while adding little to the core gameplay, had a new internet mode that allowed players to join either the GDI or Nod in an attempt to conquer the world.

As mentioned above, Red Alert 2 had Yuri's Revenge, which added a third faction lead by the titular Soviet psychic, as well as adding new units to the existing factions (the Soviets in particular underwent significant changes, what with Yuri taking all their psychic tech with him).

Wing Commander has expansion packs for both the first two "main line" games and for the Spin-OffPrivateer. Once the series went to FMV, however, it became impractical. And, no, Wing Commander Secret Ops is not an Expansion Pack, no matter how much some fans wish to paint it as such.

The SNES version of Secret Missions, the first WC1 add-on, was a fully separate game that didn't need the original, but that was a function of cartridge-based games for which the method described in the Sonic & Knuckles example, above, was impractical on the basis of costs (WC at the time not being the cash cow that was the Sonic series).

Metal Gear Solid: VR Missions was, in America and Japan, simply a (literal) mission pack spinoff to the original MGS. Unfortunately, for reasons known only to themselves, they added a disc-check onto the European versions, requiring players to own Metal Gear Solid for the game to boot. Doubly-unfortunately, the disc check doesn't work on certain PlayStation 2 models and most Play Station 3 ones, rendering European copies of Special Missions unplayable on those consoles.

Touhou fangame Touhou Pocket Wars Evolution has one in the form of Touhou Pocket Wars Evolution Plus. The expansion adds a follow-up story based around and playable versions of the cast of the 12th Touhou game.

The arcade racing game Daytona USA 2 got an update kit called Daytona USA 2: Power Edition. It changed the announcer's voice, replaced the really nice looking Beginner track with a more generic and NASCAR-like Beginner track, added a new Challenge track that had you go through all 3 courses, and added the Hornet car from the original Daytona USA.

Owners of Tetris the Grand Master 2 - The Absolute got a free update kit called Tetris: The Grand Master 2 - The Absolute PLUS (commonly referred to as "TAP"), which added some new modes: TGM+ (garbage rises from the bottom if you're clearing lines too slowly), T.A. Death (pieces drop instantly and you must survive for 500 levels, or 999 if you clear the first 500 fast enough), and allowed players to play Doubles mode on one credit. In addition, the "Grand Master" rank in Master mode is more difficult to obtain, as if it wasn't already hard enough.

Oh No! More Lemmings was originally conceived as an Expansion Pack for Lemmings, though was released as a standalone game. It is abundantly evident in the learning curve, which is a lot steeper in Oh No! More Lemmings, where there's one category of stupidly easy levels that were clearly added in as an afterthought, followed by four categories of Nintendo Really Fucking Hard madness...

Quake had Dissolution of Eternity, by Rogue, and Scourge of Armagon by Hipnotic. Quake II had The Reckoning, by Xatrix, and Ground Zero by Rogue. And Quake III Arena had Team Arena by Id themselves.

Dragon Age: Origins - Awakening picks up the story where Origins left off, with you in charge of rebuilding the Grey Wardens in Ferelden. You have the option of importing an Origins character sans any DLC content save the "Return to Ostagar" stuff (since the other DLC content is incompatible for some reason), or starting fresh with a level 18 Orlesian Grey Warden Commander. There are enough new features to call it an expansion (new talents, higher level cap, new companions), but not enough to call it a sequel (it's still basically the same game).

Star Wars: Galactic Battlegrounds, built on the Age of Empires II engine, had Clone Campaigns as its Expansion Pack. This included two new campaigns, two new factions (Confederacy and Galactic Republic), as well as new techs and units.

Massive Entertainment's first RTS Ground Control received an expansion pack, furthering the adventures of major Parker. A few faction tweaks and some additional options for units added a bit more depth.

Mechwarrior 4: Vengeance was followed up by Mechwarrior 4: Black Knight, which continued the story from a different view point. Pretty much Darker and Edgier, as it picked up after the worst possible ending. Pretty much Battletechs/MechWarriors m.o.

Another expansion for Mechwarrior 4: the Clan 'Mech and Inner Sphere 'Mech packs. Adding additional Battlemechs and weapon system to the games. Only usable in Multiplay however.

While not an expansion per se, Mechwarrior 4: Mercenaries plays around the same timeframe as Vengeance and Black Knight. Furthermore, the 'Mech pack expansions could be installed for Mercenaries as well.

Same universe, different genre: the first Mech Commander game received a gold upgrade. Which included different difficulty settings (and boy did the vanilla game need one!) and a whole new multi-mission campaign!

How Commander Pavel Chekhov ever became a full fledged commander is beyond many. Apparently he lost a whole disc with missions for Interplay's Starfleet Academy. Luckily these were found and added in an expansion called... Chekhov's Lost Mission. It did not add much to the core game, aside from 5 new missions with brutal difficulty, tying up a few dropped story lines.

Silent Hunter IV has the expansion U-Boat Missions, that allows you to command a German submarine with base on the Japanese-occupied South Eastern Asia.

Monolith Productions has a bit of history with both third-party and self-made expansions for their games, particularly first-person shooters:

Blood first had the third-party "Cryptic Passage" which just added new levels. Shortly afterward came the Monolith-produced "Post Mortem", which included new weapons, enemies, and various changes and bugfixes.

First Encounter Assault Recon had just third-party expansions, "Perseus Mandate" and "Extraction Point", which continued/complimented the base game's story, as well as adding new enemies and weapons in the case of "Perseus Mandate". Alienversus Predator 2 had "Primal Hunt", a prequel to the base game. There were also a pair of third-party expansions for Shogo: Mobile Armor Division that never saw release.

Blood II and Tron Two Point Oh each had a single first-party expansion: "The Nightmare Levels" and "Killer Ap", respectively.

Sorcerian had a multitude of scenario disks released in Japan by Nihon Falcom and various third parties.

Rainbow Six had a follow up in the form of Eagle Watch, a series of depressingly tough levels. It's sequel contained Urban Operations that included mod support (such as replacing Rainbow with SEAL Team Six and several 9/11 fan add ons), Covert Operations that includes a counterterror encyclopedia and officer test (in story one of the members of Rainbow was moving from an enlisted soldier to intel), and Black Thorn, which interestingly changed an airport level to a bus terminal after September 11, and the developers released the map for modders to play around with. The third game was followed up by Athena Sword and a Korean only expansion pack that is free to download. The XBOX and PlayStation 2 conversions were similar in having stand alone expansions to the main game, some deviating from the PC versions.